THINGS have moved rapidly where the Iran-US memorandum of understanding is concerned. While the physical document was supposed to be signed in Switzerland today, the main stakeholders — including the American and Iranian presidents — have already put their signatures on the digital dotted line , with Prime Minister Shehbaz Sharif adding his as mediator. Now, if all goes as planned, the actual negotiations will kick off in the rarefied environs of Buergenstock, with Washington and Tehran’s representatives getting down to the more difficult task of how to implement the 14-point MoU.